Cephalexin is a generic prescription drug that treats infections. Only the oral capsule comes in a brand-name version called Keflex. Cephalexin can cause side effects ranging from mild to serious.

Cephalexin is available as an oral capsule, oral tablet ... by mouth every six hours for seven to 14 days; or 500 mg by mouth ...

The active ingredient in cephalexin is cephalexin. Cephalexin comes as an oral tablet, oral capsule, and oral liquid suspension. Read on to learn about potential common, mild, and serious side ...